Method:Wash and soak toor daal for about 10 to 20 minutes and pressure cook for 3 to 4 whistles . Take the boiled and mashed daal in bowl and on a medium stove let it boil. Meanwhile add slit green chillies, turmeric powder and salt to taste to the daal. Let the daal boil and then simmer on a slow flame for couple of minutes.For tadka, heat a pan add ghee/oil. Then add mustard seeds, heeng, red chillies cut into pieces and curry leaves. Once these start to flutter add this tadka to the daal and close the lid. Daal is ready.